%0 Journal Article %A B. Rokowska %T Non-isomorphic Steiner triples with subsystems %J Colloquium Mathematicum %D 1977 %P 153-164 %V 38 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-38-1-153-164/ %R 10.4064/cm-38-1-153-164 %G en %F 10_4064_cm_38_1_153_164